Canary is still nerfed, though not as bad as Chrome Stable (38). Chrome 38 even stutters slightly on the autorunner template...and that's on a 3570k after disabling scaling.
But the worst...is Firefox. I mean, it was never great, but it's become an absolute joke. Auto-runner is a slideshow...even as it reports 60 fps. How it got this messed up just boggles the mind.
IE is smooth as silk.
Ladies and gentlemen: welcome to the twilight zone.